68896989 has 18 divisors (see below), whose sum is σ = 115766430. Its totient is φ = 39369456.

The previous prime is 68896981. The next prime is 68896991. The reversal of 68896989 is 98969886.

It can be written as a sum of positive squares in only one way, i.e., 40220964 + 28676025 = 6342^2 + 5355^2 .

It is not a de Polignac number, because 68896989 - 2³ = 68896981 is a prime.

It is a super-2 number, since 2×68896989² = 9493590186532242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68896981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 77674 + ... + 78555.

Almost surely, 2^68896989 is an apocalyptic number.

It is an amenable number.

68896989 is a deficient number, since it is larger than the sum of its proper divisors (46869441).

68896989 is a wasteful number, since it uses less digits than its factorization.

68896989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156249 (or 156239 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The square root of 68896989 is about 8300.4210134185. The cubic root of 68896989 is about 409.9523819376.

The spelling of 68896989 in words is "sixty-eight million, eight hundred ninety-six thousand, nine hundred eighty-nine".